Insulation of slasher-cylinders.



A. W. THOMPSON.

INSULATION 0F SLASHBR CYLINDERS.

APPLICATION FILED JAN. 30, 1913.

l O76 .330 Patented 0013.21, 191 3.

2 SHEETS-SHEET 1.

COLUMBIA PLANOGIAPH co.. WASHINGTON. D. c.

A. W. THOMPSON. INSULATION OP SLASHER CYLINDERS.

APPLICATION. FILED JAN; 30, 1913.

Patented 0ct.21,1913.

2 SHIEETS-SHEET 2.

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COLUMBI A PLANOORAFM C0,. WASHINGTON n C UNITED sra'ras PATENT OFFICE.

ALBERT WILLIAM THOMPSON, F LOWELL, MASSACHUSETTS, ASSIGNOR TO SAGO-LOWELL SHOPS, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSAGHU-SETTS.

Specification of ,Letters Patent.

-. INSULATION 0F 'SLASHER-CYLINDERS.

I Patented Oct. 21, 1913.

Application filed January 30, 1913. Serial No. 745,090. 7

To all whom it may concern:

Be it known that I, ALBERT W. THOMP- SON, of Lowell, in the county ofMiddlesex and State of Massachusetts, a citizen of the United States,have invented a new and use- .ful Improvement in the Insulation ofSlasher-Cylinders, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingapart of this specification, in explaining its nature.

The present invention relates to an improved means for insulating theheads of slasher cylinders, and has for its general object to protectthe cylinder against radiation-of heat in a more eflicient manner thanhas hitherto been obtained.

The customary means of insulation heretofore employed has been to coverthe head of the cylinder with a layer of sheet magnesia about one inchin thickness. This has been placed against the head of the cylinder andhas been covered with a thin sheet steel casing. I have found, however,that the magnesia may be entirely dispensed with and the heads ofcylinders better insulated by compartments or casings containing deadair.

According to the presentv embodiment of my invention each head of thecylinder is provided with a casing having formed therein separate andindependent air compartments, wherefore the head ofthe cylinder iscovered with separate layers-of dead air providing a most eflicientinsulation.

Owing to the fact that the head of a slasher cylinder is provided with avariety of adjuncts including the heads of stay bolts, a manhole, avacuum valve and journal box, provision is accordingly made so that thecasing with which thehead is provided and in which the separate andindependent compartments are formed, will not interfere with the variousparts of the head above referred to and so that these parts or fittingsof the headwill be utilized in so far as is possible in the retention ofthe casing and partition forming the respective air-containingcompartments as aforesaid, all of which can best be seen and understoodby reference to the drawings in which :Figure 1 represents in elevationa slasher cylinder head provided with an insulation embodyingmyinvention. Fig. 2 shows the cylinder in cross vertical section throughthe center thereof. Fig. 3 is'a section on the line 3-3 of :Fig. 1. Fig.lt-is a section on the,

line H of Fig. 1. Fig. 5 is a section on the line 5-5 of Fig. 1, andFig. 6 is a section on the line 66 of Fig. 1.

Referring to the drawings :1 represents a slasher cylinder of which 2 isthe rim of the cylinder and 4:, 4 the heads thereof, re

spectively. The rim 2 is secured to the head by rings 51in which theedges ofthe rim are bound and which inturn'are secured to the heads ofthe cylinder by cap screws 6 having heads 7. The heads of the cylinderare otherwise connected and the cylinder reinforced by cross-runningstay bolts 8 having'nuts 9 on the ends thereof outside the cylinderheads and bearing against the same.

In the heads of the cylindervarious openings are formed'among which arethe open ings 10 at the journal box, 11 an opening for the vacuum valve,and 12 a manhole opening which is normally closed by "a cover 13 held bycap screws 14.

Covering each head of the cylinder is a :casing 15.

Each casing consists of' a sheet steel plate which is spacedpreferablyabout one inch from the cylinder head. The casing is of such size as tocover the heads of the cap screws 6 which secure the heads of thecylinder to therim as aforesaid. The easing is held in place by means ofscrews 16 whichpass through the casing just adjacent the peripheral edgethereof and enter holes 17 tapped in the head 7'of the respective capscrews. I

In thespace left between each casing 15 such diameter that it will liesnugly between I the peripheral edge of the partition 18 and the heads 7of the cap screws. The rings 21 apart from closing the compartments'19and 20, respectively, operate also with the" heads of the cap screws tohold the partitions 18 in place against edgewise displacement. Eachpartition 18 isheld against lateral displacement and in properly spacedposition from the casing 15 and head of the cylinder by means of spaceblocks 22, 23, respectively, which are secured by screws 24 countersunkinto the space blocks 22 and passing through the same and holes in thepartition to enter threaded holes in the other space block 23.

It is necessary to have a number of holes cut in the casings andpartitions for the stay bolts, the manhole, the vacuum valve and thejournal box. Means have accordingly been provided not only for properlypositioning and holding the casings and partitions but also for closingthe respective air compartments around the various holes formed in thecasings and partitions.

At the opening adjacent the end of each stay bolt (asmay be seen byreference to Fi 5 there is orovided a castin 25 which b l g slips overthe-nut 9 on the bolt and rests against the cylinder head. This castingis provided with an annular garage 26 equal in thickness to the width ofthe air space or compartment 19. Upon the shelf provided by this flangethe edge portion of the partition 18 around the opening in itrests andis secured by screws 27 passing through the partition and threaded intothe flange. Abovethe flange the casting 25 is provided with an annularrim 28. This rim projects a distance equal to the depth of the secondair space or compartment 20 and upon the outer edge of this rim reststhat portion of the casing 15v around the opening in it. A circular nut29 is threaded upon the end of the stay bolt 8 extending through the nut9. The circular nut 29 is provided with an annular flange 30 whichcontacts with thatportion of the edge of the outer casing bearingagainst the rim 28 as aforesaid, binding and holding the casing securelyin place when the nut is screwed down.

Around the openings formed in the casings and partitions for the journalbox and vacuum valve the casing and partition are held and the airspaces or compartments closed as may be seen by reference to Fig. 3.

Here there is provided an annular casting 31 having an annular flange 82equal in thickness to the depth of the air space or compartment 19between the cylinder head and the partition. The edge of thepartitionaround the opening in it rests upon this flange and is securedthereto. by screws 33 passing through the partition. and extending into.the flange. A The casting 31 is also provided with an annular fri'm' 34:pro ieetie t? the es ae F d YP' Q ngeegual t otl ptli,

r Tc omp'artment, 20, j

linen space a n At the manhole Where a further opening in the casing andpartition is made the partition is held in a properly spaced positionbetween the cylinder head and the casing by means of space blocks 36 and37 interposed respectively between the partition and the casing on oneside and the partition and the head of the cylinder on the other side(see Fig. 6). These space blocks are held in place and secured to thepartition by screws 38 the heads of which are sockete'd within the spaceblocks 36 and the shanks of which extend through these space blocks andthrough the partition into the other space blocks 37. The outer casingis held by a sheet metal piece 39 placed over the manhole opening in it.This piece is larger than the opening in the casing so as to lap ontothe same and is secured by screws 40 which are threaded into holesformed the heads of the cap screws 14 which hold the cover 13 of themanhole as aforesaid. The compartments or air spaces 19 and 20 areclosed around the openings in the casing and partition for the manholeby means of a sheet metal ring 41 extending between the piece 39 and theouter face of the cylinder head 4. This ring is about the diameter ofthe open ings in the partition and easing, respectively, or so that itwill lie outside the heads of the cap screws 14: and snugly against theadja cent edges of the partition and easing.

The above construction makes not only 'a very efiicient insulatingstructure, better than the magnesia covering, but also con siderablycheaper. It is one also impervious to water leakage and accordinglypossesses a further advantage over the magnesia covering which wouldabsorb water leakage and this tended to unbalance the cylinder. I

Having thus fully described my invention, I claimand desire to secure byLetters Patent of the United States 1. The combination in a slashercylinder, of a rim, a head, cap screws securing said rim to said headadjacent the peripheral edge of said head, a sheet metal casing coveringsaid head and spacedthere from to form an air space between said casingand said head, mca'nsfor securing said casing to the heads of said capscrews, and a ring interposed between said casing and said head closingsaid air space around the edge thereof. 3

2. A slasher cylinder having'a head, ajfiXed casing covering said'headand spaced the'rea .\1. III' N Uri--- '1,v.,"-l.\ from to d t *t s tea 11 ing and i i an nn'u ar member 11 1t'erposed betwe' n cas ng' a'-nd]sa1d head clgsmg saidf op said nieniber i an edge against which saidcasing bears, and means for securing said casing to said member.

8. A slasher cylinder having a head, a cross bolt extending through saidhead with a nut thereon bearing against said head, a casing coveringsaid head and spaced therefrom to provide an air space between saidcasing and said head, said casing having an opening therein forreceiving the end of said cross bolt and nut thereon, an annular memberfitted over the nut on said cross bolt and against which said casingbears, and a flanged nut secured to the projecting end of said crossbolt and engaging said casing by which the bearing thereof is maintainedagainst said member.

at. A slasher cylinder having a head with a manhole therein, a cover forsaid manhole, cap screws for holding said manhole cover in place, acasing covering said head and spaced therefrom to provide an air spacebetween said casing and said head, said casing having an opening thereinin line with said manhole, a plate covering the opening in said casing,means for securing said plate to the heads of said cap screws, and aring interposed between said plate and said cylinder head for closingthe air space between said casing and head from said manhole opening.

5. The combination in a slasher cylinder, of a rim, a head, cap screwssecuring said rim to said head adjacent the peripheral edge of saidhead, a sheet metal casing covering said head and spaced therefrom toform an air space between said caslng and said head, means for closingsaid air space, a partition contained within said air space and dividingthe same into separate closed compartments, and means for supportingsaid partition.

6. The combination in a slasher cylinder, of a rim, a head, cap screwssecuring said rim to said head adjacent the peripheral edge of saidhead, a sheet metal casing covering said head and spaced therefrom toform an air space between said casing and said head, means for closingsaid air space, a partition contained within said air space and dividingthe same into separate closed compartments, openings in said partitionadjacent the peripheral edge thereof, a pair of space blocks for eachopening, one on each side of said partition, and a screw passing throughone space block and the opening in the partition and secured to theother space block whereby the partition is supported intermediate thecasing and head.

7. A slasher cylinder having a head provided with a casing covering saidhead and spaced therefrom to provide an air space between said casingand said head, a partition interposed between said head and said Copiesof this patent may be obtained for casing dividing said air space intoseparate compartments, said casing and partition having openingstherein, means for closing said compartments adjacent the outer edge ofsaid casing, and means for closing .said compartments from saidopenings.

8. A slasher cylinder having a head provided with a casing coveringsaidhead and spaced therefrom toprovide an air space between said casing andsaid head, a partition interposed between said head and said casingdividing said air space into separate compartments, the said casing andpartition having openings therein, means for retaining said casing andpartition around and adjacent the peripheral edges thereof, annularmembers around the openings in said casing and partition closing saidcompartments from said openings, said annular members presenting alsoedges against which said casing and partition bear, respectively, andmeans for securing said casing and partition to said members.

9. A slasher cylinder having a head, a cross bolt extending through saidhead with a nut thereon bearing against said head, a casing coveringsaid head and spaced therefrom to provide an air space between saidcasing and said head, a partition dividing said air space into separatecompartments, said casing and partition each having an opening thereinfor receiving the end of said cross bolt and nut thereon, an annularmember within said openings fitting over the nut on said cross bolt andproviding edges against which said casing and partition bear, means forsecuring said partition to said member, and a flanged nut arranged uponthe projecting end of said cross bolt and engaging said casing by whichthe bearing thereof is maintained against said member.

10. A slasher cylinder having a head with a manhole therein, a cover forsaid manhole, cap screws for holding said manhole in place, a casingcovering said head and spaced therefrom to provide an air space betweensaid casing and said head, a partition dividing said air space intoseparate compartments, said casing and partition each having an openingtherein in line with said manhole, a plate covering the opening in saidcasing, means for securing said plate to the heads of said cap screws,space blocks for maintaining said partition around the opening therein,and a ring interposed between said plate and said cylinder head forclosing said compartments from said manhole opening.

ALBERT WILLIAM THOMPSON.

Witnesses:

IRVINGD. KIM ALL, FRANK O. HALE.

five cents each, by addressing the Commissioner of Patents, Washington,D. G.

